"The students bringing them to school consuming them and then some of them exhibiting high levels of anxiety and you know just being hyper," she said, "and we looked at the sugar content, the caffeine content, and they said that's just not really conducive for a healthy learning environment."

Nanney says officials also considered childhood obesity.

"Certainly the childhood obesity problem that we have everywhere that's so prevalent and been on the news is another thing that we really looked at."